When I tried uploading PDF file for dictionary to commons, following error occurred. Error messages are not much helpful.
Error:
Sarth_Gujarati_Jodani_Kosh.pdf <api-error-internal_api_error_MWException>
Console output:
2015-10-20 17:55:11.592 https://commons.wikimedia.org/wiki/Special:UploadStash/thumb/13j55xvexieo.7qch2e.1600531.pdf/page1-62px-13j55xvexieo.7qch2e.1600531.pdf.jpg Failed to load resource: the server responded with a status of 503 (Service Unavailable) 2015-10-20 17:55:15.411 https://commons.wikimedia.org/wiki/Special:UploadStash/thumb/13j55xvexieo.7qch2e.1600531.pdf/page1-62px-13j55xvexieo.7qch2e.1600531.pdf.jpg Failed to load resource: the server responded with a status of 503 (Service Unavailable) 2015-10-20 17:55:18.970 https://commons.wikimedia.org/wiki/Special:UploadStash/thumb/13j55xvexieo.7qch2e.1600531.pdf/page1-62px-13j55xvexieo.7qch2e.1600531.pdf.jpg Failed to load resource: the server responded with a status of 503 (Service Unavailable) 2015-10-20 17:55:23.441 https://commons.wikimedia.org/wiki/Special:UploadStash/thumb/13j55xvexieo.7qch2e.1600531.pdf/page1-62px-13j55xvexieo.7qch2e.1600531.pdf.jpg Failed to load resource: the server responded with a status of 503 (Service Unavailable) 2015-10-20 17:55:28.515 https://commons.wikimedia.org/wiki/Special:UploadStash/thumb/13j55xvexieo.7qch2e.1600531.pdf/page1-62px-13j55xvexieo.7qch2e.1600531.pdf.jpg Failed to load resource: the server responded with a status of 503 (Service Unavailable) 2015-10-20 17:55:35.411 https://commons.wikimedia.org/wiki/Special:UploadStash/thumb/13j55xvexieo.7qch2e.1600531.pdf/page1-62px-13j55xvexieo.7qch2e.1600531.pdf.jpg Failed to load resource: the server responded with a status of 503 (Service Unavailable) 2015-10-20 17:55:45.940 https://commons.wikimedia.org/wiki/Special:UploadStash/thumb/13j55xvexieo.7qch2e.1600531.pdf/page1-62px-13j55xvexieo.7qch2e.1600531.pdf.jpg Failed to load resource: the server responded with a status of 503 (Service Unavailable)